S E RV I C E No BULLETIN

Transcription

1 2926 Piper Drive Vero Beach, Florida, U.S.A S E RV I C E No BULLETIN DATE: August 15, 1997 (S) SUBJECT: Corrosion Inspection of Main Spar Behind Fuel Tanks MODELS AFFECTED: SERIAL NUMBERS AFFECTED: PA Cherokee PA /160/180 Cherokee PA Warrior PA Warrior II PA Warrior III PA Cadet PA Archer II PA Archer III PA Cherokee PA Dakota PA T Turbo Dakota PA-28R-180 Arrow PA-28R-200 Arrow/Arrow II PA-28R-201 Arrow III PA-28R-201 Arrow PA-28R-201T Turbo Arrow III PA-28R-201T Turbo Arrow PA-28RT-201 Arrow IV PA-28RT-201T Turbo Arrow IV PA Cherokee Six PA PA Cherokee Saratoga Six 300 PA T Turbo Saratoga PA-32R-300 Lance PA-32RT-300 Lance II PA-32RT-300T Turbo Lance II PA-32R-301 Saratoga SP PA-32R-301 Saratoga II HP PA-32R-301T Turbo Saratoga SP PA-32R-301T Saratoga II TC through through & 28-E through through , and through , and up through and up through , through through , and up through & 28-E through , , through and up , through through , 28R through 28R R through 28R R through 28R , through , & up 28R through 28R and through R through 28R , 28R through 28R through through through through , through through R through 32R R through 32R R through 32R R through 32R through , through , and up 32R through 32R , , and and up (OVER) ATA: 0530

2 PAGE2 OF8 SERVICE BULLETIN NO COMPLIANCE TIME: To coincide with the next regularly scheduled maintenance inspection upon reaching seven (7) calendar years time in service and at each seven (7) calendar years thereafter. If beyond seven (7) calendar years time in service, to coincide with the next regularly scheduled maintenance inspection but not to exceed the next one-hundred (100) hours time in service and at each seven (7) calendar years thereafter. APPROVAL: The technical contents of this Service Bulletin have been approved by the Federal Aviation Administration (F.A.A.). PURPOSE: Recent reports of significant corrosion on the spar cap behind the fuel tanks in PA-28 and PA-32 series aircraft have prompted the creation of additional guidance beyond that contained in current Service/Maintenance Manuals. While the Service/Maintenance Manuals cover this area for corrosion inspection, thorough inspection is often missed due to insufficient disassembly or difficulty in gaining access to the area of inspection. This Service Bulletin is intended to supplement the existing corrosion inspection requirements by detailing specific areas for a more thorough examination and by recommendations for preventative treatment. In addition, a calendar time replacement of the flexible fuel vent hoses behind the fuel tank is established which coincide with the removal of the fuel tank required by this Service Bulletin. If not detected, significant corrosion in the spar cap area may affect the structural integrity of the spar which, if left uncorrected, may compromise the wing structure. This Service Bulletin provides an initial and repetitive inspection requirement to detect, treat, and, if necessary, eliminate damaged parts by replacement or field repair. In addition, this Service Bulletin requires repetitive replacement of flexible fuel vent hoses. INSTRUCTIONS: (Refer to the applicable Service/Maintenance Manual as required) Note Service Bulletin 646A must be complied with prior to or in conjunction with this Service Bulletin. (Check for model and serial number applicability.) Note Refer to the model charts on page 4 and 5. Each chart addresses the inspection requirement of a family group of Piper aircraft. For example PA-28 series, addresses aircraft from the Cherokees to Arrows. Identify the chart which best fits your aircraft. Drain and remove the fuel tanks from the aircraft wing. Accomplish the inspection instructions contained on the chart. CAUTION: Great care must be taken when fuel tanks are removed as fuel tanks are wing structure. If corrosion is detected and is beyond minor surface oxidation, replace or repair the affected parts before continuing with this Service Bulletin. Utilize a current revision of the Piper Parts Catalog to determine the appropriate part numbers for any required replacement part. Although this Service Bulletin addresses corrosion, the general condition of the inspected area must also be considered. Should other discrepancies be noted such as cracking, wear etc., the affected parts must be repaired or replaced. Repairs are not available from Piper, utilize AC43.13 or other FAA approved methods for an acceptable means of repair. Note Prior to application of corrosion preventative, assure that any part which may have been replaced or repaired is clean and that the paint or primer is thoroughly cured.. 4. Remove and replace flexible vent hoses at the fuel tanks and outlets (as applicable). Normal replacement of other flexible fuel lines are at 8 years or 1000 hours, however, it is recommended but not required that these lines be replaced at this time. (Any flexible line which fails inspection must be replaced regardless of time in service.) 5. To coincide with or upon the completion of the inspections required by this Service Bulletin, treat the affected areas utilizing Dinotrol AV 8, Piper Part Number Follow the instructions on the container. One container should be sufficient for PA-28 s while two containers are required for PA-32 s.

3 SERVICE BULLETIN NO PAGE 3 OF8 INSTRUCTIONS: (Cont d) 6. Close all areas where access has been gained. 7. Prior to returning the aircraft to service, it will be necessary to perform operational checks on any area or system disturbed by inspection, repair or part replacement. Refer to the appropriate Service or Maintenance Manual chapter for the applicable system for detailed information. (i.e. fuel quantity, fuel feed, etc.). 8. Upon successful completion of these instructions make an appropriate logbook entry of compliance with this Service Bulletin. MATERIAL REQUIRED: As required by inspection one or more Containers, of Dinotrol AV 8, Piper Part Number Note: This material required section does not address fuel vent hoses or any part which may need to be replaced as the result of this inspection. The part number must be obtained by referring to the latest revision of the Aerofiche Parts Catalog applicable to your model aircraft. AVAILABILITY OF PARTS: Your Piper Field Service Facility. SUMMARY: There is NO factory participation available for compliance with this Service Bulletin. Please contact your factory authorized Piper Field Service Facility to make arrangements for compliance with this Service Bulletin in accordance with the compliance time indicated and to obtain additional information concerning any applicable factory participation. NOTE: If you are no longer in possession of this aircraft, please forward this information to the present owner/operator and notify the factory of address/ownership corrections. Changes should include aircraft model, serial number, current owner s name and address. Corrections/Changes should be directed to: The New Piper Aircraft, Inc. ATTN: Customer Services Piper Drive Vero Beach, FL 32960

4 PAGE 4 OF8 SERVICE BULLETIN NO Treat the entire s par, spar angles (cap), and ribs behind the fuel tank with Dinotrol AV 8. PA 28 & PA 28R SERIES CHART (Typical) Refer to SB 977 attach fitting for condition and security. Check for loose, damaged or broken bolts or nuts. Inspect fuel tank attach hardware and gang channels (nut plate strips) for condition. Replace as required. Replace flexible fuel vent hoses. (Ref SB 646A) Inspect vent hard lines for exterior and interior corrosion. Flush hard line with mineral spirits under pressure through a clean cloth. excessive debris or corrosion deposits are observed replac the line.(see note 4) Inspect the entire spar and all spar angles behind the fuel tank with special attention to the area of the inboard upper and lower spar caps. If corrosion is detected, it is recommended that a thorough inspection throughout the wing be accomplished. (See corrosion examples on page 8.) Inspect the exterior of the fuel tanks for leaks. Inspect the interior for corrosion or evidence of sloshing compound. If either condition exists, clean, repair or replace the fuel tanks. WARNING: Use or evidence of any sloshing compound is prohibited. wires and terminals. Replace components as required. Replace the gaskets. Inspect flexible fuel hoses and couplings. Replace as required. (see note 4) NOTES 1. All inspections are for corrosion (intergranular, exfoliation etc.) however, any area or part should also be checked for other anomalies such as damage, cracking or wear. Should any part or area be determined to be defective in any way, an FAA approved repair or replacement of that area or part must occur. 2. All inspections appearing above apply to fixed gear, retractable gear, or T tailed aircraft unless noted. Some inspection areas may be slightly different on different models. (Such as the vent and fuel line routing, etc.) 3. Inspection means to disassemble as necessary to determine the condition. This includes gaining access as necessary by removing panels or skin, removing rivets, removing paint and or the use of NDT as required. 4. All flexible fuel vent lines must be replaced every seven years or 1000 hours (first to occur). Other flexible lines and couplings must be replaced every eight years, (seven recommended) or at engine overhaul (first to occur), 5. Refer to the latest revision of the applicable Piper Parts Catalog for part numbers as required. Refer to the latest revision of the applicable Piper Service or Maintenance Manual for removal, installation and testing.

5 SERVICE BULLETIN NO PAGE 5 OF8 PA 32 & PA 32R SERIES CHART (Early) Aspect the entire spar and all spar angles Treat the entire spar, spar hind the fuel tank with special attention to angles (cap), and ribs behind the area of the inboard upper and lower spar caps. If corrosion is detected, it is recommended that a thorough inspection throughout the wing be corrosion examples on page 8.) Refer to SB 977 Inspect the spar and forward attach fitting for condition and security. Check for loose, damaged or broken._ bolts or. nuts..-_-. gang channels (nut plate strips) forcondition. Replace as required. Inspect flexible fuel hoses and couplings. Replace as required. (see note 4) Replace flexible fuel vent hoses. (Ref SB 646A) Inspect vent hard lines for exterior and interior corrosion. Flush hard lines with mineral spirits under pressure through a clean cloth. If excessive debris or corrosion deposits are observed replace the line.(see note 4) Remove fuel quantity senders. Inspect for condition, operation, and security and freedom of the float on the arm. Inspect the condition of wires and terminals. Replace components as required. Replace the gaskets. Inspect the exterior of the fuel tanks for leaks. Inspect the interior for corrosion or evidence of sloshing compound. If either condition exists, clean, repair or replace the fuel tanks. WARNING: Use or evidence of any sloshing compound is NOTES 1. All inspections are for corrosion (intergranular, exfoliation etc.) however, any area or part should also be checked for other anomalies such as damage, cracking or wear. Should any part or area be determined to be defective in any way, an FAA approved repair or replacement of that area or part must occur. 2. All inspections appearing above apply to fixed gear, retractable gear, or T tailed aircraft unless noted. Some inspection areas may be slightly different on different models. (Such as the vent and fuel line routing, etc.) 3. Inspection means to disassemble as necessary to determine the condition. This includes gaining access as necessary by removing panels or skin, removing rivets, removing paint and or use of NDT as required. * All flexible fuel vent lines must be replaced every seven years or 1000 hours (first to occur). Other flexible fuel lines and couplings must be replaced every eight years, (seven recommended) or at engine overhaul (first to occur). 5. Refer to the latest revision of the applicable Piper Parts Catalog for part numbers as required. Refer to the latest revision of the applicable Piper Service or Maintenance Manual for removal, installation and testing.

6 PAGE 6 OF 8 SERVICE BULLETIN NO PA. x 32 mm, PA.. PA m.. 32R & (RT), SERIES L..IV CHART Inspect the entire spar and all spar angles Treat the entire spar; spar behind the fuel tank with special attention to hi: the area of the inboard upper and lower ol AV 8, spar caps. If corrosion is detected, it is recommended that a thorough inspection throughout the wing be accomplished. (See corrosion examples on page 8.), Inspect the spar and forward attach fitting for condition and security. Check for loose, damaged or broken bolts or nuts. Inspect fuel tank attach hardware and gang channels (nut plate strips) for Remove fuel quantity senders. Inspect to condition. Replace as required. condition, operation, and security and freedom of the float on the arm. Inspect the condition c Replace flexible fuel vent hoses. (Ref SB 646A) Inspect vent hard lines for exterior and interior corrosion. Flush hard lines with mineral spirits under pressure through a clean cloth. If excessive debris or corrosion deposits are observed replace the line.(see note 4) wires and terminals. Replace components as required. Replace the gaskets. Inspect the exterior of the fuel tanks for leaks. Inspect the interior for corrosion or evidence of sloshing compound. If either condition exists, clean, repair or replace the fuel tanks. WARNING: Use or evidence of any sloshing compound is prohibited. and couplings. Replace as required. (see note 4) NOTES 1. All inspections are for corrosion (intergranular, exfoliation etc.) however, any area or part should also be checked for other anomalies such as damage, cracking or wear. Should any part or area be determined to be defective in an way, an FAA approved repair or replacement of that area or part must occur. 2. All inspections appearing above apply to fixed gear, retractable gear, or T tailed aircraft unless noted. Some inspection areas may be slightly different on different models. (Such as the vent and fuel line routing, etc.) 3. Inspection means to disassemble as necessary to determine the condition. This includes gaining access as necessary by removing panels or skin, removing rivets, removing paint and or use of NDT as required. 4. All flexible fuel vent lines must be replaced every seven years or 1000 hours (first to occur). Other flexible lines and couplings must be replaced every eight years, (seven recommended) or at engine overhaul (first to occur) Refer to the latest revision of the applicable Piper Parts Catalog for part numbers as required. Refer to the lates rrevision of the applicable Piper Service or Maintenance Manual for removal, installation and testing.

7 SERVICE BULLETIN NO PAGE 7 OF8 PA 32 & PA 32R SERIES CHART (Tapered Wing) Treat the entire spar, spar angles (cap), and ribs behind the fuel tank with Dinotrol AV 8. Inspect the entire spar and all spar angles behind the fuel tank with special attention to the area of the inboard upper and lower spar caps. If corrosion is detected, it is recommended that a thorough inspection throughout the wing be accomplished. (See corrosion examples on page 8.) Refer to SB 977 Inspect the spar and forward attach fitting for condition and security. Check for loose, damaged or broken bolts or nuts. Inspect fuel tank attach hardware and gang channels (nut plate strips) for condition. Replace as required. Remove fuel quantity senders. Inspect for condition, operation, and security and freedom of the float on the arm. Inspect the condition of wires and terminals. Replace components as required. Replace the gaskets. Replace flexible fuel vent hoses. (Ref SB 646A) Inspect vent hard lines for exterior and interior corrosion. Flush hard lines with mineral spirits under pressure through a clean cloth. If excessive debris or corrosion deposits are observed replace the line.(see note 4) Inspect the exterior of the fuel tanks for leaks. (Metal tank only.) For bladder fuel tanks, see maintenance manual Chapter 28. Inspect interior for corrosion or evidence of sloshing compound. If either condition exists, clean, repair or replace the fuel tanks or fuel tank liners. WARNING: Use or evidence of any,^*i.:-^ Inspect flexible fuel hoses and couplings. Replace as A\ NOTES 1. All inspections are for corrosion (intergranular, exfoliation etc.) however, any area or part should also be checked for other anomalies such as damage, cracking or wear. Should any part or area be determined to be defective in any way, an FAA approved repair or replacement of that area or part must occur. 2. All inspections appearing above apply to fixed gear, retractable gear, or T tailed aircraft unless noted. Some inspection areas may be slightly different on different models. (Such as the vent and fuel line routing, etc.) 3. Inspection means to disassemble as necessary to determine the condition. This includes gaining access as necessary by removing panels or skin, removing rivets, removing paint and or use of NDT as required. 4. All flexible fuel vent lines must be replaced every seven years or 1000 hours (first to occur). Other flexible fuel lines and couplings must be replaced every eight years, (seven recommended) or at engine overhaul (first to occur). 5. Refer to the latest revision of the applicable Piper Parts Catalog for part numbers as required. Refer to the latest. revision of the applicable Piper Service or Maintenance Manual for removal, installation and testing..

8 PAGE 8 OF 8 SERVICE BULLETIN NO CORROSION EXAMPLES (Spar Cap and Tank Bay) below TYPICAL CLEAN INSPECTION (Spar Cap and Tank Bay) above